package com.geline.easytrans.serializer;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.math.BigDecimal;

/**
 * 显示小数，保留2位
 * 用法：
         @JsonSerialize(using = BigDecimalSerializer.class)
         private BigDecimal totalAmount;
 */
public class BigDecimalSerializer extends JsonSerializer<BigDecimal> {

    @Override
    public void serialize(BigDecimal value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        if (value != null) {
            value = value.setScale(2, BigDecimal.ROUND_HALF_UP);
            gen.writeString(value.toString());
        }
    }
}
